// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_LOADER_STREAM_RESOURCE_HANDLER_H_
#define CONTENT_BROWSER_LOADER_STREAM_RESOURCE_HANDLER_H_

#include <memory>

#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "content/browser/loader/resource_handler.h"
#include "content/browser/loader/stream_writer.h"

namespace net {
class URLRequest;
} // namespace net

namespace content {

class StreamRegistry;

// Redirect this resource to a stream.
class StreamResourceHandler : public ResourceHandler {
public:
    // |origin| will be used to construct the URL for the Stream. See
    // WebCore::BlobURL and and WebCore::SecurityOrigin in Blink to understand
    // how origin check is done on resource loading.
    StreamResourceHandler(net::URLRequest* request,
        StreamRegistry* registry,
        const GURL& origin);
    ~StreamResourceHandler() override;

    void SetController(ResourceController* controller) override;

    // Not needed, as this event handler ought to be the final resource.
    bool OnRequestRedirected(const net::RedirectInfo& redirect_info,
        ResourceResponse* resp,
        bool* defer) override;

    bool OnResponseStarted(ResourceResponse* resp, bool* defer) override;

    bool OnWillStart(const GURL& url, bool* defer) override;

    // Create a new buffer to store received data.
    bool OnWillRead(scoped_refptr<net::IOBuffer>* buf,
        int* buf_size,
        int min_size) override;

    // A read was completed, forward the data to the Stream.
    bool OnReadCompleted(int bytes_read, bool* defer) override;

    void OnResponseCompleted(const net::URLRequestStatus& status,
        bool* defer) override;

    void OnDataDownloaded(int bytes_downloaded) override;

    Stream* stream() { return writer_.stream(); }

private:
    StreamWriter writer_;

    DISALLOW_COPY_AND_ASSIGN(StreamResourceHandler);
};

} // namespace content

#endif // CONTENT_BROWSER_LOADER_STREAM_RESOURCE_HANDLER_H_
